crank bearings

**Sat Jun 04, 2005 4:42 am » Post: #1 » Download Post**

if ones crank bearings go does one have to buy a new crank.

just wondering coz i have a motor where one conrods bigend bearings needles have fallen out resulting in a siezure. is the crank any use to me as a spare or should i throw it out??

**Mon Jun 06, 2005 8:05 am » Post: #2 » Download Post**

There's much debate on this, with some claiming success from a rebuild and others a spate of failures from a rebuild. The problem is the middle bearing which is an odd size for the speed rating.

See here for info on the correct bearings:

http://www.nsr250.net/forums/viewtopic.php?t=201&sid=d0c0880b0cbb71b13ee8e3a89974d578
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

**Mon Jun 06, 2005 9:13 am » Post: #3 » Download Post**

hey dave

the one at the bottom of the conrod is the stuffed one. is it fixable?

thanks

**Mon Jun 06, 2005 9:38 am » Post: #4 » Download Post**

Ooh, good question. Not heard of this, but yes I belive so - mostly because no-one has ever said there was a problem with that bearing!

Is the crank marked at all?
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

Last edited by Dave Ett on Mon Jun 06, 2005 10:22 am; edited 1 time in total

**Mon Jun 06, 2005 9:57 am » Post: #5 » Download Post**

no if in marked u mean from the destroyed bearing. it looks all good

**Mon Jun 06, 2005 11:50 am » Post: #6 » Download Post**

Dietmar has the bearings in Oz.

Very swift service too